Pitman connection



J. STURROCK PITMAN GoNNEqTIoN Filed March l5. 1922l Ilwfeefor.

5in/W007i,

Teas

V xiii' p v`conneetirig:the 'pitmanffromlf said Vfparts. i

',y A ur'theroloj'eet is to provide a pit-` i I i i205 Clamping member-While'in its 'clamping position; I

l:Patented Octo `25', 19271" D rconfliwiior fQHIQAeO,ILiNoISgvAgConfinement Q1? 1 i f i prrr/LAN ooivivnorrori. l

Application filed Maren 13,l 1 9212-5Seria1/:0,;543)212 i.

, Vfmvention relates tov pitman -eonnectionV especially adapted fiorvmowers-and like '.CllfGS-- y Y The object ofthe invention. is. toprovide Y VVfmeans4 vvherebvthe Wear,betiveentheipib:

l the associating or cO-Operating V`infin and parte v'of ,the :machineon'fxv'hich the pitman isr sed is automatically compensated for,`

hezfpart's atall timesare' held in proper stnient. f 1 j'l..

uitherobject isto 'provide means ifor and quickly connectingthe'pitman-to' f man onnectionfin which the number of movfable'p'ar-tsare reduced togafminimum. Y I I :Thesezand other ebjects'are' attainedby the 1v "Iu'se'f'ii'i- 'connectionfvvit'h pitman straps of a byV meansoffwhich thesestrapsar'e forced towardv eachother orsepa-qvyratedfromreach y otlieryaiid urtherf'by the] usent a lcranklmember inconnection'ivith 1 fthe' clamping meniberthei latter is prevented` f' i.25;.from' -becrning' accidentally unclamped A Referring totheaccompanying drawings, 'ilu-havefor the purpose of villustration' shown"one eiribodiiiient"Whiclnmy 'invention may., :iw'assume in practice.` y

' lnu'the drawings,wherein likeV characters e represent the same partsthroughout the sev-j. *Y*j eiulvie'Ws-4'l e lfpis a V-'plan view theclamping member in. its

*Fig 4 is a plan view: par

e sho ving Athe clamping member in its'inoperative position.' C

@Thepitman illustijatedfinconnection With;-

' formed as anl integralfzpartQofthe Crank@ 27 ,Y

`isa camrportion mand a flat lshoulder porv thei'sh'oivi'ngofmyinvention embodies tivo y cessful operation 'of lthe construction.vThe f straps 11 and 12 are secured to the Wood por-V tion 13 of thepitmanby means of a series of rivets 141 The gras'sward end of the pitfVvman straps 11 and 12varep`r0vided with the l lpartsrizo-operatingtherewith7 tfand dis l of the stubbleivard` g 35 (end of a Vpitma'n'embodying my improve.

2 isa side elevational view ofFig'. 1 -3 'is jan elevational View.partly inY v 'I ,Jfsecti'on 'showing i Idinoperative position; and 1 1l' I i tly in .sect/ion:

15 and 16 respectively,which ar .adapted-toi' l receive and :form theconnection vv-ith' the v spherical; portions-formed 4on theggknife; hidf4lherouter.: surfaces otheseiportion's, lld 16 are provided with fbeveled suracesqg 17 and 181er 'the-purposes hereinafter; set forth; zAdjacent. these Vbeveledj surfacesf'f17 fand1118- :5. andextendinglongit'udinally` Withfresp'ectto the straps 11anda12-areelongatedslotte'd Y apertures`V 19 and; 20, -Avhich tern'rinately in-`opl' positely disposedcorrespoirdingfbevelehsurq ,aces121 and 22-inth'efstrapsf11 fand"12;re f Y 1specti're1y:Positioned vbetvveerr the'straps;11' f and`v 12 i adjacent 'the i grassivard, end of fthev -Woodportion' 13 i are tivo i {enlarged",` bearing lportions 23and=211providedaivith registering -apertii'res -25 .and 26;-Yirdaptedi,toi--pivotallyfref ceiveav crank .member 27( @The crankizmember 2711s'providedliv-ithla,` laterallyextending v arm A28, vhich in:turneis,providedyWitlrop:v

ypositely disposedr4 Wings` or proj ectifon'sffA 2,97 which yare,adaptedto :engage lthe Aedgesj or; the'vstrapsi11andP12, as shoWn-iniFige2finthe; normal operation y@flocking the,V clamp? Y ing member.` f:Theiarm128 ofithe ',.cranky27 isprovided Witha slotted; aperture 30,1adapted ito-,slidably receiv'eithe:stubbleward vend 31ik ofiafclaiiipinginemberx2- The-,clamping stubbleivardl end 31 of the cla-nr Qing'member? respectfto ythe crank 27 and contactiran, abutl The crankclampingl member'.v 'Adj-went he? 19in and:

tion 36 forthepurpose hereinafter set forth.V

A p 27is i-fiirtlher provided ywith square shanlrportion 34: ladaptedto' receive a Y 1 Wrench ouother; .toolfor manipulatingithe *Y 12 32.isorovidedgivith za'slot which'perinitsa the VVclairipingim einher 32; toreciprocate; ,With l 1ng,position and.th'erel'iy,gloelr vthe,lparts in ipositioiito.prevent; accidental unclaniping" l nthereoY f" 106 y' 'The'Clamping member '.32 is providedwiui tvvo fork-extending portions 38.and 39,

gage the beveled surfaces 17 -andflS respecfwhch 'in tum-are'pw'vide'dvwiih oppositeiy u ,fdiverging surfaces LMland 41 adaptedfluente..

tively Aforclamping the straps 11 and 12101" l thekrnife head lofthemower. Similarly, ,Y

clampingv member 32 is provided with stubblewerdlyinclined surfaces 42and 43 adapt- .edlto engage the inclined surfaces--2lxzind 22-f` of thestraps ll end 12 in the normal opera-V tion, of spreading or VseparatingVthe straps l11 :sind `12pr aiidbdsconnectiiig Vtli'e7pitinen from l' Ypli'shed by swinging tlie'cr'nk 27 tothe posi- -tion shown kinv Fig. 3,with-drawing the clamping member 32 from 'the surfaces 17V and 18 andspreading the straps by forcing in rigqif L5. v 4agiifangularly:disposed shank `44,.which in the clamping member to th'e3position shownThe clamping member 'is provided with turn carries-'a' spring *457.11The grassward endofY the spring 45 is normally held in con- '.tact'withthe Clainpin'g'member v32 bymeans -1 fof-jen enlarged Voi-ac'ollziiportion .46. The fstubblewardend .oftlie spring toissup- 1 ported 'onthecarni surface '35` of the crank n 27fby mefins'of l, washer 47, shownsin,

l Figgf.V It will be noted that iis'tliecrank 'is' thrown vfromthepositioln shown in Fig. 3

-to Vthe position show-n,v inl Fig(r 2- ,thatV the f'`S2J-m'ey'be.recipiocated within the limits of .in jfthe slot' 37;,"Tliet is, the member 32 may? frbe moved stubblewfirdly in a mannertocoinpress'thespring 4-5 until thelgrasswardend l '7" 'of the slot 37strikes the pin 33 .andthugpre;- f ,Vents the accidental uiicla-mping orspread- V-ffing'of the lstraps 11 2111517125 member is provided with anangularly bent f shank 44, that an eXtra` movable partihzislbeeneliminzitedand that a very elicient and "compacteutometic pitman,which can'` be esily-jclainpedend spreadquickly, has vbeen designedf t jlVliile l have iiithis application-speci'i icelly vdescribed but one`embodiment which llniyjinvention may assume in practice, it is` ofcourse t'obe'under'stoodthatiny invention isv not limitedutojthespecificiorm-shown herein but :maybe modified to'assume other )formswithout depirting vfrom the spirit rand i `scope yo-myinvention,;itbeing inyintention y to'V include :all such `formsL within thescope ofthe appended claims'. .v Y

to secure by Letters Patent isi I .l. In a pitmen connectiomepitinzinhav- What I claim yris my invention and desire ing resilientstraps, saids'trapshaving registering slots, eclamping member',having aAsliziiil( rigidly fixed theretoand et an angle to V'thel pleine'Vthereofgfr` said? member,being adapted to protrude Vvthrough said strapsand slidzibly engage seid straps, lsaid `'member having therein a walledslot, acrank mehr beil pivotedto said straps and connected to saidclamping member, ai spring disposed between said cre-nk and saidclamping member, vand ineens including the walls of the v slot in seidclamping meniberorliinitingf the yielding inoveineiit of said/.clampingmember. and j preventing the Lspreading otsziidstraps.y

accidental 'i x75 2.V In ,si pinnen-connection, a-pitman havingresilient strnpssaid straps havingfregistering slots, e clamping memberadapted toV` protrude through said slots and slide-bly en-y 86 ing eVshrink rigidly thereto and at an gege seid straps, said clamping memberhav-v .frngl'e to the plene thereof, a crankrmember pivotcd to saidstrapsend connected to the shiiiil of seid. clamping lmember,-a springsurrounding seid shank end disposed Vbe-` tween ,snid'ci'zmk and saidclamping member, sind means formingbzi part of seid. clampiii member forclziiiiping and, spreading saidstreps; in y -r I f Iir e pitiiiaiiconnection, e pitinaii having` slotted resilient strapse Aclamping memlb'erh-:iving 'a shankrigidlyiixedl thereto-'and f eten angle to the`plane'thereof,.saidmemf' bei' being adapted to protrude through theyslots in the straps, a Y*crank carried bythe v i l, straps.YeindliaivingfaJ shoulder portion adapt- Irt willbe further noted vby theconstructionebove'describechiii whichthe clamping edto ectuzite-thelclamping member, 'and ineens causing vthe lclamping member. and

shoulder portion on the crank to abut where-V by accidental :unclempingof the straps is Y prevented. f i,

4l. In e pitman vconnectioin-aJ pitinanhav-A ing resilient straps, 'eclampingjmemberfor f the straps, said member'fheving a shank rigidly.iixed thereto and at 'aneiigle tothe plane-thereof, agcraiikhaving eshoulder portion pivoted between the straps, and kaJ .parts are inclamping, position tofpreventaccidental iin'clampiiig thereof Intestimony whereof I- aii'iX my signetuiel JOHN ernennen.

